Mechanism for operating pumps, &amp;c.



T. A. DAVIS.

MECHANISM FOR OPERATING PUMPS, &o.

-APPIZIOA'EION' FILED I'EB.7, 1908. I Patented Nov. 17 8 SHEETS-SHEET 1.

- witnaouo T. A. DAVIS. MECHANISM FOR OPERATING PUMPS, 6:0. APFLIOATION FILED FEB. 7, 190a.

Patented Now-17, 1908.

2 SHEETS-SHEET 2.

WITNESSES INVENTOR,

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THOMAS A. DAVIS, OF FINDLAY, ILLINOIS.

MECHANISM FOR OPERATING PUMIPS, 860.

Specification of Letters Patent.

Patented Nov. 17. 1908.

Application filed February 7, 1908. Serial No. 414,761.

T 0 all whom it may concern:

Be it known that I, THOMAS A. DAVIS, a citizen of the United States, residing at Findlay, in the county of Shelby and State of Illinois, have invented certain new and useful Improvements in Mechanism for Operating Pumps, &c., of which the following is a specification.

This invention relates to mechanism for operating pumps and other like machinery; and it has for its object to provide simple and improved mechanism, capable of being operated by hand or by power of any suitable description for actuating single, double acting or compound air pumps and light machinery of any description, easily and eifectively.

With these and other ends in view, which will readily appear as the nature of the invention is better understood, the same consists in the improved construction, and novel arran ement and combination of parts which will he hereinafter fully described and particularly pointed out in the claims.

In the accompanying drawings has been illustrated a simple and preferred form of the invention, showing the application of the same to a double acting air pump of ordinary construction; it being, however, understood that no limitation is necessarily made to the precise structural details therein exhibited, but that changes, alterations and modifications within the scope of the invention may be resorted to when desired.

In the drawing: Figure 1 is a front elevation illustrative of the invention. Fig. 2 is a top plan view of the same. Fig. 3 1s a sectional detail view taken on the plane indicated by the line 33 in Fig. 2. Fig. 4 is a transverse sectional view taken on the plane indicated by the line 4.-1 in Fig. 2. 5 is a transverse sectional view taken on the plane indicated by 5-5 in Fig. 2.

Corresponding parts in the several gures are denoted by like characters of reference.

A suitable base or foundation A supports the pump c linders 1, 1' which are secured in position y means of a clip 2 and which are spaced apart by means of brackets or spacing members 3, 3.

The piston rods 4 and 5 of the pump cylinders 1 and 1, respectively, are provided :with extensions constitutm racks 6 and 7, the teeth of which face inwardly, toward each other. A base plate 8, which is suitably bolted or otherwise secured upon the foundation A, is provided with a keeper 9 constituting a guide or bearing for the rack bar 7. A stub axle or pintle 10 which projects from the supporting plate 8 carries a pinion or spur wheel 11 that meshes with the rack bars 6 and 7, which are thereby connected for simultaneous movement in opposite directions. The pintle 10 also carries a fly wheel 12, the hub of which 13 is provided with teeth constituting a pinion 14:. The fly wheel 12, it will be observed, is separate from, and operates independently of, the pinion or spur wheel 11, from which it may be separated by suitable means, such as washers or collars 15. Clips or guides 16 serve to hold the rack bars 6 and 7 securely in mesh with the pinion or spur wheel 11.

A stub or pintle 17 projecting from the base plate 8 serves to support a gear wheel 18 meshing with the pinion 14: upon the hub of the fly wheel 12; and the gear wheel 18 has a wrist pin 19 which is connected by a pitman 20 with the rack bar 6 connected with the piston rod 4 of the cylinder 1. Said rack bar 6 is provided near its outer extremity with a slot 21 for the reception of a pin 22 projecting from a lever 23 which is suitabl fulcrumed or supported upon the base or oundation A; this lever may be actuated by hand, or by power of any description.

It will be readily seen from the foregoing description that when the lever 23 is operated it serves to actuate the rack bar 6 and the piston rod 4: from which motion is transmitted, through the medium of the pinion or spur wheel 11, to the rack bar 7 of the piston rod 5, the pistons of the two cylinders being thus actuated in opposite directions. At the same time, the throw of the rack bar 6 serves, through the medium of the link or pitman 20, to impart rotation to the gear wheel 18 which meshes with the inion 14 upon the hub of the fiy wheel, which latter is thus rapidly rotated, giving force and impetus to the operation of the pump. The operation of the latter will thereby be greatly facilitated, and great speed and e'fiiciency may thus be developed with comparatively slight expenditure of power.

It is desired to be understood that this invention is applicable not only to the operation of pumps, but that it may be successfully applied to the operation of many forms of light machinery. It is also evident that by making slight structural changes,

such as will readily suggest themselves to the skilled mechanic, the principle of the invention is capable of being advantageously applied to single acting as well as to compound pumps.

Having thus described the invention, what is claimed is:

1. I11 a device of the class described, a pair of rack bars facing each other and supported for reciprocation, an intermediately supported spur wheel meshing with the rack bars, a fly wheel supported for rotation concentrically with the spur wheel, means for actuating one of the rack bars, and means for transmitting motion from one of the rack bars to the fly wheel.

2. In a device of the class described, a pair of rack bars facing each other and supported for reciprocation, a spur wheel supported for rotation between and meshing with the rack bars, a fly wheel supported concentrically with the spur wheel, a pinion connected with the fly wheel, a suitably supported gear wheel meshing with the pinion, a link or pitman connecting the gear wheel with one of the rack bars, and means for positively actuating one of the rack bars.

3. In'a device of the class described, a pair of rack bars supported for reciprocation, a spur wheel meshing with and transmitting motion between the rack bars, an independently supported fly wheel, and means for transmitting motion to the fly wheel from one of the rack bars.

4. In a device of the class described, a pair of rack bars reciprocatory in opposite directions, supporting and guiding means for the rack bars, a pinion or spur wheel meshing with and transmitting motion between the rack bars, one of said rack bars being provided with a slot, an operating lever having a pin operating in the slot of the rack bar, a fiy wheel supported for rotation and having a pinion, an independently supported gear wheel meshing with the pinion, and a link or pitman connecting the gear wheel with one of the rack bars.

In testimony whereof I affix my signature, in presence of two witnesses.

THOMAS A. DAVIS.

Witnesses H. S. TERRY, B. J. JOHNSON. 

